After I had the same problem with the dealer provided "free" blades, my shop replaced the entire wiper assembly (including blades). Replacement was Bosch twin spoiler 551S. Made in Belgium. I've had them for 2 years now, with no streaking and no sounds.
I think the dealer replacement blades were made in Mexico. I bought some replacement blades that were made in Belgium, just like the entire blade assembly. But I haven't yet used the replacements, since the blades that came with the assembly have held up so well. The part # is 61613424489, but I don't know whether that part # guarantees you get the Belgium sourced blades.
Last edited by spokelizard; 01-22-2013 at 12:08 PM.
Reason: correction + more info